12-23-2008
Newbi - Understanding the Code and proper download
Hi,
I am new to Unix and there is code that is trying to get data from a location and save it. However it's output is messing up some date fields in the source file (ie... in source is may say 10/10/2008, the code will output 10/10/20088). This is the piece of code. Can someone help to understand what it does and how it can be fixed? Thanks in advance!
#!/bin/ksh
#set final file
REPORT="/sas02/logistics/prom/incoming/LCL_KIT2_RPT.txt"
REPSRV="lcl####.ngco.com"
# using telnet through the http port 80 get the current name of the lcl promo file
REPURL=`(sleep 1; echo "GET /kixprod/cgi-bin/biceps_exec_log.pl?day=0 HTTP/1.0"; echo""; sleep 1) | telnet $REPSRV 80 | sed '/GROCERY.PROMOS/!d; s/.*ngco.com//; s/">.*//'`
#echo $REPURL
[[ -r $REPORT ]] && rm $REPORT
# using telnet through the http port 80 get the LCL_GROCERY_PROMO.txt file
(sleep 1; echo "GET $REPURL HTTP/1.0"; echo "Content-type: text/plain"; echo ""; sleep 60) | telnet $REPSRV 80 | sed "/,/!d; s/<.*>//; s/\&/\&/; s/\"/\q/" > $REPORT
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LEARN ABOUT DEBIAN
sleepenh
SLEEPENH(1) General Commands Manual SLEEPENH(1)
NAME
sleepenh - an enhanced sleep program.
SYNOPSIS
sleepenh [initial-time] sleep-time
DESCRIPTION
sleepenh is a program that can be used when there is a need to execute some functions periodically in a shell script. It was not designed
to be accurate for a single sleep, but to be accurate in a sequence of consecutive sleeps.
After a successful execution, it returns to stdout the timestamp it finished running, that can be used as initial-time to a successive exe-
cution of sleepenh.
OPTIONS
There are no command line options. Run it without any option to get a brief help and version.
ARGUMENTS
sleep-time is a real number in seconds, with microseconds resolution (1 minute, 20 seconds and 123456 microseconds would be 80.123456).
initial-time is a real number in seconds, with microseconds resolution. This number is system dependent. In GNU/Linux systems, it is the
number of seconds since midnight 1970-01-01 GMT. Do not try to get a good value of initial-time. Use the value supplied by a previous exe-
cution of sleepenh.
If you don't specify initial-time, it is assumed the current-time.
EXIT STATUS
An exit status greater or equal to 10 means failure. Known exit status:
0 Success.
1 Success. There was no need to sleep. (means that initial-time + sleep-time was greater than current-time).
10 Failure. Missing command line arguments.
11 Failure. Did not receive SIGALRM.
12 Failure. Argument is not a number.
13 Failure. System error, could not get current time.
USAGE EXAMPLE
Suppose you need to send the char 'A' to the serial port ttyS0 every 4 seconds. This will do that:
#!/bin/sh
TIMESTAMP=`sleepenh 0`
while true; do
# send the byte to ttyS0
echo -n "A" > /dev/ttyS0;
# just print a nice message on screen
echo -n "I sent 'A' to ttyS0, time now is ";
sleepenh 0;
# wait the required time
TIMESTAMP=`sleepenh $TIMESTAMP 4.0`;
done
HINT
This program can be used to get the current time. Just execute:
sleepenh 0
BUGS
It is not accurate for a single sleep. Short sleep-times will also not be accurate.
SEE ALSO
date(1), sleep(1).
AUTHOR
This manual page was written by Pedro Zorzenon Neto.
2008/04/20 SLEEPENH(1)